0.0023x²+30.022x＝78,377.8131945
    x^2-2362x+191667
    2j*2j
    280x=(x+4)*240
    a^6-52a^4+68a^2+4096=0
    2q-9+q²=0
    x^2+2x-13=0
    -1/lnx
    7[3-10(2-6x)]+2(7x-7)=301
    2-x=4-4x
    35+16x-3x^2=0
    x-sinx=2.72
    x-sinx=2.72
    x-sinx=27.21
    (-㏑0.3)×(1-x＾2)＾0.5=π×x
    a^3-73a^2+943a+729=0
    a^6-73a^4+943a^2+729=0
    -2^3.8 = (x-100)*ln2
    -2^3.8 * ln2 = x-100
    -2^(-7.2+11)*ln2 = x-100

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